The Appenzeller Sennenhund is a medium-size breed of dog, one of the four regional breeds of Sennenhund-type dogs from the Swiss Alps. The name Sennenhund refers to people called Senn, herders in the Swiss Alps. Appenzell is an alpine region in the northeast of Switzerland. The Appenzeller Sennenhund is a medium sized mountain dog, 18.5-23 ins (47–58 cm) at the withers and weighing 49-70 lbs (22–32 kg). Like the other Sennenhunds, the Appenzeller Sennenhund has a heavy, molosser-like build and a distinctive tricolour coat. The breed's ears are small and triangular, set high and hanging down against the dog's cheeks, similar to a button ear. Faults in the breed's appearance include wall eye, kinked tail, a single coat, and a coat that is not tricolour. The four breeds of Sennenhund, with the original breed name followed by the most popular English version of the breed name.